Connect/Disconnect Coupling for a Container

ABSTRACT

A coupling assembly for removing contents of a container from an opening in the container. The coupling assembly includes a container insert coupled to the container opening, the container insert including an insert passage, and an insert vent path extending through the container insert. The coupling assembly also includes a unit including a unit cavity, a valve assembly positioned axially therein, and a unit vent path. When the unit is coupled to the container insert, the insert vent path mates with the unit vent path to create a complete vent path extending from within the container to a vent port on the unit, and the valve assembly opens to place the insert passage in fluid communication with the first unit cavity.

RELATED APPLICATIONS

This application claims the benefit of U.S. Patent Provisional Application Ser. No. 60/807,024 filed on Jul. 11, 2006, the entirety of which is hereby incorporated by reference.

This application is related to U.S. patent application Ser. No. 11/095,125 filed on Mar. 30, 2005, the entirety of which is hereby incorporated by reference.

BACKGROUND

A variety of industries use pails, drums, and larger Intermediate Bulk Containers (“IBC's” or “Totes”) for the delivery of liquid chemical media. These containers typically have a variety of closure sizes and styles depending on the size and type of container. Some common closure types are threaded bung openings, snap-in, and crimp-in closures. Some example threaded bung openings include 2″ buttress female and 2″ NPS female (commonly used in 30 gal, 55 gal, and larger drums and IBC's), 63 mm male (commonly used in 5 gal jerry cans), and European Mauser.

There are a billion or more rigid containers and countless other types of semi-rigid and flexible containers produced each year around the world. In order to extract the contents of a container, most containers are simply tipped over so that the contents inside are emptied through one of the openings of the container or a simple valve inserted into the opening. Other containers have an opening in the bottom (typically the larger IBC's) that allow for a bottom dispense through a simple hand valve.

A percentage of the containers are emptied of their contents while the container remains upright using a top feed device such as a hand operated pump or a motor driven mechanical positive displacement pump that draws the contents out of the container via a dip-tube. Most of these containers are intended to be low cost “one way” containers (i.e., the containers are filled once and never seen again by the original filler). The containers may be refilled again by secondary fillers typically up to a maximum of five refills before the containers are destroyed or recycled.

An example life cycle of a container includes the following. Initially, pre-cleaned or in-housed cleaned containers are received. Next, the containers are clean room chemical filled and certified, and fitted with dust caps. Subsequently, the containers are shipped as dedicated containers to the user. Next, a dust cap is torn away and the user certifies the contents by checking extractables and/or particles levels, and the dispense head is installed. Next, the container contents are extracted, the dispense head is removed, and new dust caps are installed for the return trip. Subsequently, the empty container is shipped to a supplier. Finally, the clean container is returned for filling or for cleaning.

The basic system requirements for a dispense system for a container are defined by the following four factors: closed or open systems, reusable or disposable systems, industrial (low-purity) grade or high grade (ultra-pure) chemical systems, and Department of Transportation (DOT) or United Nations (UN) approved or unapproved systems.

Closed systems are designed to prevent exposure of a user to the contents of the container at any phase of the connection cycle (disconnected phase, connecting/disconnecting phase, and connected dispensing phase). Open systems have at least the following two design possibilities: 1) a system that allows the user to be exposed to the container contents (either liquid or vapors) when the connect/disconnect system is being connected or disconnected and/or when the system is in the connected/dispense phase, and 2) a system that allows air to enter the container when product is withdrawn or allows vapors to escape when the system is in the connected/dispensing phase.

Reusable systems typically include a dip tube that is intended to be used for many (100+) connection cycles. A reusable system may have to be removed several times from the container during its life to allow for cleaning. Disposable systems typically include a dip tube that is intended to be used less than five connection cycles and then thrown away. Disposable systems may be inserted into the container once with the intent of being disposed of along with the container.

Industrial (low-purity) grade (IPG) chemical systems make up about 80% of all chemicals supplied. Chemicals that fall under this category include those chemicals wherein the purity of the chemical is suitable for common chemical applications such as industrial cleaners, soaps, surfactants, clean-in-place (CIP) chemicals for dairy and food, dry cleaning and laundry, and agricultural pesticides and herbicides, as well as other general use applications. IPG containers must be delivered in a reasonably clean system but do not require the stringent clean requirements needed for handling Ultra Pure chemicals such as metallic extractability, total organic carbon (TOC), and particle contaminants. High grade (ultra-pure) chemical systems (HPG) applications make up about 20% of all chemicals supplied. Chemicals that fall under this category include chemicals wherein the purity of the chemical must meet criteria for which ultra filtration down to the parts per million (PPM), parts per billion (PPB), or even parts per trillion (PPT) of particles and/or metals. This classification typically involves such specialized applications as microelectronics, laboratory, and biopharmaceutical industries.

The specific product requirements that differentiate an IPG from an HPG system are primarily related to the materials of construction, handling procedures, and whether the system is “closed” or “open”, as described above. As to materials of construction, metals are typically not allowed or desired to come in contact with the container contents. Plastic resins must be very clean and free from metallic contaminants, colorants, etc. These same standards apply for seals that may come into contact with the container contents.

As to handling procedures, the materials must be handled in a way that minimizes the transfer of contaminants to the piece parts or finished goods during production or shipping (e.g., mold release agents are not allowed), regrind plastic resin should not be used in components that have direct contact with the container contents, and lubricants are typically not permitted.

Whether the system is “closed” or “open” is relevant to the extent that Ultra-Pure chemicals often require minimum contact with oxygen. Typically, an inert gas “blanket” is maintained within the container above the container contents versus allowing air, which has a higher O₂ content, to enter the container and make up for the container contents that are removed. Typically this blanket gas will be nitrogen, CO₂, or other inert gas.

Whether or not a dispense system is DOT and/or UN approved relates to standards for shipping a combined container and closure system. This combination of container and closure system must be approved and certified by the DOT and/or the UN before being transported. Container with closure systems that are used “in house” therefore are required to meet different safety and other standards as opposed to container with closure systems that must be shipped over-the-road.

SUMMARY

One aspect of the present disclosure relates to a coupling assembly for removing contents of a container from an opening in the container. The coupling assembly includes a container insert coupled to the container opening and having first and second insert ends, the container insert including a first seal positioned adjacent to the first insert end to seal the container insert with respect to the container, and defining a first insert cavity with insert threads, a second insert cavity, a third insert cavity with an insert valve engagement member, and a dip tube engagement surface adjacent to the second insert end for engaging a dip tube that extends into the container, the container insert defining an insert passage extending from the first insert end to the second insert end and through the first, second, and third insert cavities, and the container insert defining an insert vent path extending through the container insert to the first insert cavity. The coupling assembly also includes a unit including first and second unit ends, and a coupling ring with threads positioned to engage the insert threads when coupled thereto and a first unit seal positioned to seal the container insert with respect to the first insert cavity, a coupling sleeve extending to the first unit end, a valve assembly positioned axially within the coupling sleeve, the valve assembly including a poppet member with first and second ends, the first end including a valve that seals against a shoulder formed in a first unit cavity defined by the unit, and a spring member positioned in the first unit cavity to force the valve into the closed position against the shoulder, and the unit defining a unit passage through the coupling sleeve and the first unit cavity to a unit port, and defining a unit vent path extending through the coupling sleeve to a vent port. When the unit is coupled to the container insert, the insert vent path mates with the unit vent path to define a complete vent path extending from within the container to the vent port, and the insert valve engagement member forces the poppet member against the spring member so that the valve unseats with respect to the shoulder to place the insert passage in fluid communication with the first unit cavity and the unit port.

The above summary is not intended to describe each disclosed embodiment or every implementation. Figures in the detailed description that follow more particularly exemplify embodiments. While certain embodiments will be illustrated and describing embodiments of the invention, the present disclosure is not limited to use in such embodiments.

DESCRIPTION OF THE DRAWINGS

Referring now to the drawings in which like reference numbers represent corresponding parts throughout:

FIG. 1 is a perspective view of an example coupling assembly with adapters, a connector, and a dip tube exploded therefrom;

FIG. 2 is a perspective view of the coupling assembly of FIG. 1 in exploded form;

FIG. 3 is a top view of an example container insert of the coupling assembly of FIG. 1;

FIG. 4 is a cross-sectional view of the container insert of FIG. 3 taken along line 4-4;

FIG. 5 is a cross-sectional view of the container insert of FIG. 4 taken along line 5-5;

FIG. 6 is a bottom view of an example dispense unit of the coupling assembly of FIG. 1;

FIG. 7 is a cross-sectional view of the dispense unit of FIG. 6 taken along line 7-7;

FIG. 8 is a cross-sectional view of the coupling assembly of FIG. 1 coupled to an example container; and

FIG. 9 is an enlarged view of a portion of the coupling assembly of FIG. 8.

DETAILED DESCRIPTION

In the following description of the illustrated embodiments, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration of embodiments. It is to be understood that other embodiments may be utilized as structural changes may be made without departing from the spirit and scope of the present disclosure.

An example coupling assembly 10 is shown and described with reference to FIGS. 1-9. Coupling assembly 10 includes a container insert 12, a dispense unit 14, and a dip tube 16. In example embodiments, container insert 12 and dispense unit 14 are configured for a quick connect/disconnect function relative to each other.

For example, as shown in FIG. 1, dispense unit 14 includes a port 127 that is configured to accept an adapter 57 that is threaded therein. An opposite end of adapter 57 includes a connector structure 58 that is configured for connection with a connector 59. In example embodiments, connector 59 is a quick connect/disconnect connector such as that disclosed in U.S. Pat. No. 6,231,089 filed on Mar. 10, 1999, the entirety of which is hereby incorporated by reference.

In addition, dispense unit 14 includes a vent port 79 that is configured to accept an adapter 49 that can be threaded therein. An opposite end of adapter 49 includes a barbed surface 47 for connection with a hose (not shown) that is, in turn, connected to a source of gas such as air.

In example embodiments, coupling assembly 10 provides a semi-closed system for dispensing and storing contents in a container. In the embodiment shown, coupling assembly 10 is not a closed system, in that dip tube 16 and container insert 12 do not have a shut-off valve. Coupling system 10 includes a shipping cap 13 that seals dip tube 16 and container insert 12 during shipping. Because there is no separate valve in dip tube 16 and container insert 12, the contents of the container to which container insert 12 is coupled can be exposed to a user outside of the container during the typically brief time when shipping cap 13 is removed and dispense unit 14 is not yet connected to container insert 12.

When in the connected state, the following three general configurations exist for managing the vapors and potential user contact with the container contents:

-   -   a fully open vent that provides air intake into the drum while         vapors are allowed to escape through the same opening that the         incoming air travels through;     -   a checked un-ported vent that is typically an air checking         device control that is incorporated into the container insert or         the dispense unit, allowing venting air into the container but         not allow vapors or the container contents out through the vent         opening; or     -   a ported vent that involves incorporation of an isolated and         sealed air vent flow path through the container insert into the         dispense unit, which would have an external port. For example, a         barb flared (MPT) can be used and would allow the user to have         potentially three options for managing the pressure conditions         inside the drum as follows: (1) simply vent the vapors to         atmosphere, (2) install a one-way check valve into the port that         allows air into the drum, but not allow vapors out of the same         port (this would provide for a sealed container in the event of         a tip over condition), or (3) plumb the vapor flow path to a         controlled location such as an air scrubber or filter (this         option may provide a method for the end user to apply an inert         layer of “blanket gas” to the container contents to prevent         oxidation (e.g., nitrogen)).         Of these several options, a fully open vent does not provide a         sealed container, although the option can be inexpensive. A         ported vent option provides the most flexibility, although it         can involve a compromise between flow capacity and expense. A         checked unported vent is a solution between the fully opened         vent and the ported vent options.

Coupling assembly 10 can include any of these venting options. In the examples described and shown herein, coupling assembly 10 includes the ported vent option.

Coupling assembly 10 can be suited for industrial pure grade (IPG) applications, although the use of certain materials can make coupling assembly 10 available for use with high purity grade (HPG) chemical systems as well. In example embodiments, coupling assembly 10 is also designed to be capable of being Department of Transportation (DOT) or United Nations (UN) Certified with a variety of different container sizes.

In example embodiments, it is desirable that the container is compatible with a plurality of chemicals and other container contents while minimizing the number of container insert configurations so as to minimize potential inventory while maximizing build lots. Two factors that influence this objective is the material selection for the container insert 12 and related seals (not shown), and the number of container interfaces. Both polyethylene and polypropylene can be used for the container insert material because of the very broad chemical compatibility and relatively low cost of these materials. Other materials for construction include high-density polyethylene (HDPE) or Teflon materials such as PTFE or PFA for applications related to high purity grade (HPG) chemical systems.

One consideration when choosing materials for container insert 12 is the DOT/UN Certification requirement that requires testing at 0° F., a temperature at which polypropylene materials often do not perform well. The materials may also be “Fluorinated,” which is a process that exposes the finished polyethylene part to a Fluorine gas resulting in a part that has typically better chemical resistance than standard polyethylene materials.

In example embodiments, container insert 12, dip tube 16, and associated sealing member positioned between container insert 12 and the container are designed so that the combined cost of these features is such that it is cost effective to dispose of these components, for example, when the container is disposed of or after a limited number of uses.

In example embodiments, container insert 12 is a disposable part that has a life of about, for example, five to ten cycles. Container insert 12 can be designed to be a relatively low cost product. Alternatively, in other embodiments, container insert 12 can be constructed in a way so that it has a greater life cycle.

Dip tube 16 can be made from materials different from those used by container insert 12 or dispense unit 14. For example, in industrial pure grade (IPG) applications, the dip tube can include a “rigid” polytube such as polypropylene, polyethylene, or a soft flexible TYGON type material. In example embodiments, dip tube 16 is about ⅜ to about ¾ inches in outer diameter. For high pure grade (HPG) applications, tubing can be made of a rigid type material such as FEP or PFA having dimensions of about ½ to about 1 inch in outer diameter with a wall thickness of about 0.06 to 0.07 inches.

In example embodiments, all of the components of coupling assembly 10 are made from a polymer material due to the relatively low cost and high resistance to wear and corrosion of these materials as compared to metals and other materials. This can include springs or other mechanisms that may be required in coupling assembly 10. In some embodiments, coated metal materials or metal materials can be used at locations that are not exposed to the container contents. Some example materials for use in the springs include Hastelloy C, 316SS, PPS, PEEK, and PTFE/FEP encapsulated 316SS.

In the examples shown, coupling assembly 10 can be used for container applications that involve a “pump sucking” of the container contents from the container, so that coupling assembly 10 can be exposed to a slight vacuum pressure (e.g., of about −5 psi maximum). Typically, drum pressure ratings are about 15 psig for plastic materials and 36 psig for metal materials. In example embodiments, coupling assembly 10 is designed for use within a temperature range of about −32° to 140° F.

Coupling assembly 10 can be configured with features that reduce fluid spillage upon disconnect of the container insert 12 and the dispense unit 14. In one embodiment, the fluid spillage at disconnect is minimized to levels less than 0.1 cc/disconnect range if possible.

Coupling assembly 10 can also configured to minimize the turbulence in the flow path through the coupling assembly. Agitation of the pump contents is minimized in order to avoid aeration of the pumped material and the generation of particles and degradation of flow performance. Coupling assembly 10 is also functional without the use of lubricant.

Referring now to FIGS. 1-5, container insert 12 includes first and second ends 24, 26, an open passage 23 that defines a flow path, a dip tube engagement surface 30, and a valve engagement member 32.

Dip tube engagement surface 30 include ribs, channels or features on an internal or external surface of container insert 12 at first end 24 for connection of dip tube 16. Valve engagement member 32 is positioned within a wall 33 forming a cavity 31 within passage 23 of container insert 12. Valve engagement member 32 includes a wall structure 40 with an end 42 and a slot 46 formed therein. Slot 46 can be useful for facilitating draining of any fluids collected around a wall structure 40, thereby preventing fluids from puddling within container insert 12 and reducing the chance for exposure by the user to the container contents.

Second end 26 includes a wall 63 forming an open cavity 64 and includes a plurality of threads 66 formed thereon, a container engagement member 70, and a sealing member 72.

Container engagement member 70 can have any number of different sizes and features for connecting to a particular container opening. For example, member 70 can be in the form of a bung, cap, or pail cover, such as, for example, a two inch buttress bung, S56X4 buttress bung, S70X6 buttress bung, a two inch NPS or BSP bung, a DIN 61, an S63 cap, or a flex spout or other removable pail cover. In the example shown, container engagement member 70 includes a bung style male threaded portion having a plurality of threads 71 sized to fit within a common threaded opening of a container.

Seal member 72 provides a sealing function between container insert 12 and the container.

Shipping cap 13 is used to seal the container when dispense unit 14 is not coupled to the container insert 12. Shipping cap 13 includes threads 19 formed on an outer surface thereof that are sized to engage internal threads 66 of second end 26 of container insert 12. Shipping cap 13 also includes a sealing member 17, such as an O-ring or similar structure, that is capable of forming a seal between an outer circumference surface of sealing member 17 and an inner surface of second end 26 of container insert 12.

Shipping cap 13 also includes an actuator seat 15 that is configured for engagement by an off-the-shelf tool such as, for example, a #4 Phillips or a ⅜″ flat standard screwdriver, or a standard square, hexagon, or torque type driving tool structure. Although it is possible to form actuator seat 15 with features that would require a specialized installation tool for installing and removing the container insert, or applying a specific amount of torque in doing so, the actuator seat 15 in the example shown is configured to provide a relatively reliable seal that can be established with a relatively low amount of torque using a relatively conventional tool available to most users. Thus, shipping cap 13 provides additional convenience for a user while minimizing the chances of damaging cap 13 or container insert 12 from the user over tightening shipping cap 13, which may more frequently occur when using specialized tools.

In example embodiments, a keying scheme is used to assist the user in determining which dispense unit should be connected to a container insert of a container. In one example, no keying is provided. In another example, visual keys are provided on the dispense unit and container insert. In another example, visual and/or mechanical keys are provided. Example keying schemes are described below.

In example embodiments, a key member 65 (see FIG. 2) is positioned within a cavity 28 of passage 23 of container insert 12. Key member 65 includes a plurality of key slots 67 formed therein that correspond to keys formed in a mating portion of dispense unit 14, as described below. In the example embodiment shown, key member 65 is a separate member that is snap fit (see detent 89 of container insert 12 shown in FIG. 9 that engages key member 65) or otherwise coupled within cavity 28. In alternative embodiments, key member 65 can be integrally formed within cavity 28 of container insert 12. In example embodiments, key member 65 forms an interference fit with the walls of cavity 28 so that key member 65 can be rotated within cavity 28. In this manner, key member 65 and dispense unit 14 attached thereto can be spun after dispense unit 14 is coupled to container insert 12 to, for example, change the direction of lines extending from dispense unit 14 (e.g., connector 59).

Container insert 12 also includes a key 29 coupled to an exposed surface of insert 12 (see, e.g., port 27 in FIG. 8). Key 29 can include text, color, or other indicia that indicates the contents of the container to which container insert 12 is coupled. In addition, dispense unit 14 includes a key ring 39 coupled thereto. See FIGS. 2 and 7. Key ring 39 can include text, color, or other indicia that indicates the container to which dispense unit should be connected. For example, in one embodiment, key 29 and key ring 39 are both colored the same color so that visual confirmation that dispense unit 14 can be coupled to container insert 12 is provided. Such a configuration can be used in conjunction with the keying structures identified above and/or the smart technology described below to assure that the dispensing unit is connected to the proper container insert.

Container insert 12 includes a vent passage 77 defined adjacent to second end 26. See FIGS. 2 and 8. Vent passage 77 extends from between threads 71 of container engagement member 70 through wall 63 of container insert 12 and threads 66 to cavity 64. Vent passage 77 facilitates venting of gas into and out of the container to which container insert 12 is attached, as described further below.

Referring now to FIGS. 1, 6, and 7, dispense unit 14 includes a coupling ring 80, a coupling sleeve 82, a spring 84, an adapter member 86, and a valve assembly 88.

Coupling ring 80 includes a drum insert engagement surface 96 having a plurality of threads 97, and coupling ring 80 engages a seal 83 positioned between coupling ring 80 and coupling sleeve 82.

Drum engagement surface 96 and associated threads 97 are configured to engage the plurality of threads 71 of container engagement member 70. Actuator surface 98 (e.g., projections) is used by a user to rotate engagement surface 96 once threads 97 are in position for engagement with threads 71 of the container insert 12. A seal 131, such as an O-ring, is positioned adjacent on drum engagement surface 96 to form a seal between dispense unit 14 and wall 63 forming cavity 64 of container insert 12.

A vent passage 78 extends through dispense unit 14 to vent port 79. See FIGS. 2 and 8. Specifically, vent passage 78 extends through coupling ring 80, along a passage formed between a portion of ring 80 and coupling sleeve 82, and to vent port 79. Vent passage 78, in conjunction with vent passage 77 of container insert 12, provides a vent path between the inside of the container to which coupling 10 is attached and the environment outside of the container (i.e., a line attached to vent port 78).

Coupling sleeve 82 includes first and second ends 100, 102, a sealing member 104, a key member 106, and a poppet sealing surface 114. Sealing member 104, such as an O-ring, is positioned at first end 102 and is configured to provide a fluid seal between first end 102 of the coupling sleeve 82 and the walls forming open cavity 28 of container insert 12.

Key member 106 can be integrally formed into coupling sleeve 82, or can be a separate member (as shown in FIGS. 2 and 7) that is snap fit or otherwise coupled to the coupling sleeve 82 at a predetermined position (see detent 87 of key member 106 shown in FIG. 9 that engages coupling sleeve 82). Key member 106 includes a plurality of keys 108 that are sized and positioned to engage key slots 67 formed on key member 65 of container insert 12. See FIGS. 6, 8, and 9. If keys 108 are not aligned with key slots 67, key member 106 cannot be inserted into key member 65, thereby not allowing dispense unit 14 to be coupled to container insert 12. Keying can be provided to, for example, stop the coupling of a dispense unit 14 to an improper container insert 12.

Poppet sealing surface 114 extends within an interior diameter of the coupling sleeve 82 and provides a fluid seal between valve assembly 88 and coupling sleeve 82. In some embodiments, poppet sealing surface 114 can be located at other positions along the length of coupling sleeve 82 depending on, for example, the size, shape, and position of various valve assembly members and the desired sealing surface defined by the valve assembly members.

Spring 84 is positioned within a bore 120 of adapter member 86 and provides a spring force against valve assembly 88, thereby maintaining a seal between valve assembly 88 and coupling sleeve 82 when dispense unit 14 is in a closed or rest state. Valve assembly 88 is shown in an open state in FIG. 7. Spring 84 can be made from any material suitable for the coupling assembly 10 application, and can include, for example, polymer materials, metal materials, or embedded metal materials.

Adapter member 86 includes an adapter portion 128 with a port 127 with threads 129, and a coupler sleeve connection member 130. Adapter portion 128 is sized to connect to a dispense line (not shown) via adapter 57 and connector 59. See FIG. 1. The adapter portion 128 can include structures on an external surface thereof that assist in providing a sealed connection with a dispense line, such as threads 129. Connection member 130 can have any desired configuration for securing adapter member 86 to the coupling sleeve 82 with a releasable or a permanent connection.

Valve assembly 88 includes poppet 132 with a passage 133, first and second ends 138, 140, and a sealing member 134 such as an O-ring. Poppet 132 is shaped to form a seal with poppet seat surface 114 of coupling sleeve 82. Poppet 132 can seal with coupling sleeve 82 at various positions on poppet 132 such as, for example, on a slanted surface or on a surface extending parallel to an axis of dispense unit 14. Sealing member 134 provides additional sealing function between valve assembly 88 and coupling sleeve 82.

First end 138 of poppet 132 extends axially from valve assembly 88 of poppet 132 to first end 102 of coupling sleeve 82. Second end 140 can include a plurality of openings adjacent to poppet 132 to promote flow of the container contents through valve assembly 88. First end 138 of valve poppet 132 is configured to contact valve engagement member 32 of container insert 12. In use, first end 138 of poppet 132 contacts valve engagement member 32 and moves poppet against the axial forces applied by spring 84 to open and close the valve assembly 88. In the open position, passage 133 is in fluid communication with bore 120 and port 127.

Referring now to FIGS. 8 and 9, dispense unit 14 is shown coupled to container insert 12 to form coupling assembly 10.

As dispense unit 14 is inserted into container insert 12, keys 108 of key member 106 of dispense unit 14 are inserted into key slots 67 of key member 65 of container insert 12. If keys 108 do not align with key slots 67, the coupling of dispense unit 14 with container insert 12 is prevented. Otherwise, if keys 108 do align with key slots 67, dispense unit 14 can be coupled to container insert 12.

As dispense unit 14 is inserted, threads 97 of drum insert engagement surface 96 of coupling ring 80 engage threads 66 of wall 63 within cavity 64 of container insert 12. Coupling ring 80 is rotated to thread dispense unit 14 onto container insert 12. Seal 131 of drum engagement surface 96 forms a seal between dispense unit 14 and wall 63 forming cavity 64 of container insert 12 as dispense unit 14 is threaded onto container insert 12.

In example embodiments, coupling ring 80 can rotate freely relative to the coupling sleeve 82, thereby making it possible for key features 67, 108 to remain in engagement with each other and continue to move axially relative to each other while the threads 97 rotate relative to the threads 66.

As dispense unit 14 is threaded onto container insert 12, dispense unit 14 moves axially such that first end 102 of coupling sleeve 82 is inserted into dispense unit 14 until seal 104 engages the wall forming cavity 31. As coupling sleeve 82 is inserted, second end 138 of poppet 132 contacts end 42 of wall structure 40 of engagement member 32. Wall structure 40 forces poppet 132 axially against spring 84 so that sealing member 134 is unseated from poppet seat surface 114 of coupling sleeve 82.

In the coupled state as shown in FIG. 8, container insert 12 is coupled to an example container 300, and container insert 12 and dispense unit 14 together form a fluid path 111 from second end 24 of container insert 12 to port 127 of dispense unit 14. In this manner, fluid can flow to/from container 300 coupled to container insert 12 to/from equipment coupled to port 127 of dispense unit 14.

In addition, a vent path 113 is formed by vent passage 77 of container insert 12 and vent passage 78 of dispense unit 14. In this manner, vent path 113 extends from within the container to which container insert 12 is coupled, through passages 77, 78, and to vent port 79 of dispense unit 14.

In example embodiments, when a vacuum pressure condition exists within the container when, for example, fluid is being extracted, vent path 113 allows airflow from outside the container, through port 79, passages 77, 78, and into the internal volume of the container. In one embodiment, a hose from an air compressor can be connected to port 79 to force air through vent path 113 to assist in the extraction of fluid from the container.

The sequence of connecting and valving functions for the coupling assembly 10 enables: 1.) proper keying of the container insert 12 and dispense unit 14 features, 2.) a positive connection between the container insert 12 and dispense units 14, and 3.) opening of the valve for dispensing of the contents of the container.

As described above, in alternative embodiments, coupling assembly 10 includes a “smart reader” system for identifying information related to the container and the container contents to which container insert 12 and dispense unit 14 are coupled. For example, container insert 12 can include a radio frequency identification tag, and dispense unit 14 can include a radio frequency identification reader. The reader can read information from the tag related to the container, such as the size and certification, and information related to the container insert such as, for example, certification ratings, number of uses, the contents of the container, the dates when the container was filled or emptied, and the length of time of connection between container insert 12 and dispense unit 14. This information can be communicated to a remote location. Additional details regarding such a system can be found in U.S. patent application Ser. No. 11/095,125 filed on Mar. 30, 2005. Additional details regarding radio frequency devices incorporated into connectors is found in U.S. Pat. No. 6,649,829 filed on May 21, 2002, the entirety of which is hereby incorporated by reference.

In the examples shown, it can be advantageous in some embodiments to use a separate key member 106 that is coupled to coupling sleeve 82 of dispense unit 14. A separate key member 106 can be produced for many different key configurations related to, for example, different container contents, industries, etc. Thus, the majority of dispense unit 14 components can be produced with a single design while only key member 106 is changed and separately coupled to coupling sleeve 82 for different keying configurations and applications. In other embodiments, the features of key member 106 can be integrally formed into the coupling sleeve 82, which option may be well suited for high production of a single key configuration.

In example embodiments herein, the unit 14 is described as a “dispense” unit. However, in alternative embodiments, the unit and container insert can be used to fill or otherwise insert material into the container, as opposed to dispensing material from the container.

The above specification provides a complete description of the manufacture and use of the disclosed embodiments. Since many alternative embodiments can be made without departing from the spirit and scope of the present disclosure, the invention resides in the claims hereinafter appended. 

1. A unit for a coupling assembly for removing contents of a container from an opening in the container, the unit comprising: a main unit body including first and second unit ends; a coupling ring with threads positioned to engage insert threads of a container insert when coupled thereto, the coupling ring being configured to rotate about the main unit body; a first unit seal positioned to seal with respect to the container insert; a coupling sleeve extending to the first unit end; a valve assembly positioned axially within the coupling sleeve, the valve assembly including a poppet member with first and second ends, the first end including a valve that seals against a shoulder formed in a first unit cavity defined by the unit, and a spring member positioned in the first unit cavity to force the valve into a closed position against the shoulder; wherein the unit defines a unit passage through the coupling sleeve and the first unit cavity to a unit port, and defines a unit vent path extending through the coupling sleeve to a vent port.
 2. The unit of claim 1, wherein, when the unit is coupled to the container insert, the coupling sleeve defines a unit keyed surface that mates with an insert keyed surface of the container insert.
 3. The unit of claim 1, wherein, when the unit is coupled to the container insert, the unit vent path mates with an insert vent path of the container insert to define a complete vent path extending from within the container to the vent port.
 4. The unit of claim 1, wherein, when the unit is coupled to the container insert, the poppet member is forced against the spring member so that the valve unseats with respect to the shoulder to place the first unit cavity and the unit port in fluid communication with an insert passage defined by the container insert.
 5. The unit of claim 1, further comprising an adapter including first and second adapter ends, the first adapter end of the adapter being configured to mate with the unit port, and the second adapter end being configured to mate with a connector.
 6. The unit of claim 5, wherein the connector is a quick connect/disconnect connector.
 7. A coupling assembly for removing contents of a container from an opening in the container, the coupling assembly comprising: a container insert configured to be coupled to the opening of the container and having first and second insert ends, the container insert including a first seal positioned adjacent to the first insert end to seal the container insert with respect to the container, and defining a first insert cavity with insert threads, a second insert cavity, a third insert cavity with an insert valve engagement member, and a dip tube engagement surface adjacent to the second insert end for engaging a dip tube that extends into the container, the container insert defining an insert passage extending from the first insert end to the second insert end and through the first, second, and third insert cavities, and the container insert defining an insert vent path extending through the container insert to the first insert cavity; and a dispense unit including a main dispense body including first and second dispense ends, and a coupling ring with threads positioned to engage the insert threads when coupled thereto and a first dispense seal positioned to seal the container insert with respect to the first insert cavity, a coupling sleeve extending to the first dispense end, a valve assembly positioned axially within the coupling sleeve, the valve assembly including a poppet member with first and second ends, the first end including a valve that seals against a shoulder formed in a first dispense cavity defined by the dispense unit, and a spring member positioned in the first dispense cavity to force the valve into a closed position against the shoulder, and the dispense unit defining a dispense passage through the coupling sleeve and the first dispense cavity to a dispense port, and defining a dispense vent path extending through the coupling sleeve to a vent port; wherein, when the dispense unit is coupled to the container insert, the insert vent path mates with the dispense vent path to define a complete vent path extending from within the container to the vent port, and the insert valve engagement member forces the poppet member against the spring member so that the valve unseats with respect to the shoulder to place the insert passage in fluid communication with the first dispense cavity and the dispense port
 8. The coupling assembly of claim 7, wherein the coupling ring is configured to rotate about the main dispense body.
 9. The coupling assembly of claim 7, further comprising an adapter including first and second adapter ends, the first adapter end of the adapter being configured to mate with the dispense port, and the second adapter end being configured to mate with a connector.
 10. The coupling assembly of claim 9, wherein the connector is a quick connect/disconnect connector.
 11. The coupling assembly of claim 7, further comprising a shipping cap that is configured to seal the dip tube and the container insert during shipping.
 12. The coupling assembly of claim 11, wherein the shipping cap includes cap threads formed on an outer surface thereof that are sized to engage the insert threads formed in the first insert cavity of the container insert, and a sealing member that seals with respect to the first insert cavity of the container insert.
 13. The coupling assembly of claim 7, further comprising a key coupled to an exposed surface of the container insert.
 14. The coupling assembly of claim 13, wherein the key is configured to provide a visual indicia of the contents of the container, and wherein the visual indicia corresponds to a key ring coupled to the dispense unit.
 15. The coupling assembly of claim 7, wherein, when the dispense unit is coupled to the container insert, the coupling sleeve defines a dispense keyed surface that mates with an insert keyed surface of the container insert.
 16. The coupling assembly of claim 15, wherein the insert keyed surface includes a plurality of keys that are sized and positioned to engage key slots formed in the dispense keyed surface when the dispense keyed surface mates with the insert keyed surface.
 17. A method for dispensing contents of a container, the method comprising: providing a container insert having first and second insert ends, the container insert including a first seal positioned adjacent to the first insert end to seal the container insert with respect to the container, and defining a first insert cavity with insert threads, a second insert cavity, a third insert cavity with an insert valve engagement member, and a dip tube engagement surface adjacent to the second insert end for engaging a dip tube that extends into the container, the container insert defining an insert passage extending from the first insert end to the second insert end and through the first, second, and third insert cavities, and the container insert defining an insert vent path extending through the container insert to the first insert cavity; providing a unit including a main unit body including first and second unit ends, and a coupling ring with threads positioned to engage the insert threads when coupled thereto and a first unit seal positioned to seal the container insert with respect to the first insert cavity, a coupling sleeve extending to the first unit end, a valve assembly positioned axially within the coupling sleeve, the valve assembly including a poppet member with first and second ends, the first end including a valve that seals against a shoulder formed in a first unit cavity defined by the unit, and a spring member positioned in the first unit cavity to force the valve into a closed position against the shoulder, and the unit defining a unit passage through the coupling sleeve and the first unit cavity to a unit port, and defining a unit vent path extending through the coupling sleeve to a vent port; coupling the container insert to an opening in the container; and coupling the unit to the container insert such that the insert vent path mates with the unit vent path to define a complete vent path extending from within the container to the vent port, and the insert valve engagement member forces the poppet member against the spring member so that the valve unseats with respect to the shoulder to place the insert passage in fluid communication with the first unit cavity and the unit port. 